Display rack



FIG. 1 is a reduced front perspective view of a display rack showing my new design;

FIG. 2 is a top plan view thereof;

FIG. 3 is a side elevational view taken from the right of FIG. 1, the side opposite being a mirror image thereof;

FIG. 4 is a rear elevational view thereof. 

The ornamental design for a display rack, as shown. 